/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg true --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread-ext/02_inc_cas.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-wip.dk.empire-owicki-6bf5761-m [2023-12-05 21:00:03,711 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-05 21:00:03,776 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2023-12-05 21:00:03,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-05 21:00:03,824 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-05 21:00:03,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-05 21:00:03,825 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-05 21:00:03,826 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-05 21:00:03,826 INFO L153 SettingsManager]: * Use SBE=true [2023-12-05 21:00:03,830 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-05 21:00:03,830 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-05 21:00:03,830 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-05 21:00:03,831 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-05 21:00:03,832 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-05 21:00:03,832 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-05 21:00:03,832 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-05 21:00:03,833 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-05 21:00:03,833 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-05 21:00:03,833 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-05 21:00:03,833 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-05 21:00:03,833 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-05 21:00:03,834 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-05 21:00:03,834 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-05 21:00:03,835 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-12-05 21:00:03,835 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-05 21:00:03,835 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:00:03,835 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-05 21:00:03,836 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-05 21:00:03,836 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-05 21:00:03,836 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-05 21:00:03,837 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-05 21:00:03,837 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-05 21:00:03,837 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-05 21:00:03,837 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-12-05 21:00:04,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-05 21:00:04,096 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-05 21:00:04,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-05 21:00:04,100 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-05 21:00:04,101 INFO L274 PluginConnector]: CDTParser initialized [2023-12-05 21:00:04,102 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/02_inc_cas.i [2023-12-05 21:00:05,342 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-05 21:00:05,583 INFO L384 CDTParser]: Found 1 translation units. [2023-12-05 21:00:05,584 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/02_inc_cas.i [2023-12-05 21:00:05,596 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8c57d21/223a22eb47184a39b404d635b2060e1d/FLAG4fc4168a9 [2023-12-05 21:00:05,608 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab8c57d21/223a22eb47184a39b404d635b2060e1d [2023-12-05 21:00:05,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-05 21:00:05,611 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-05 21:00:05,612 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-05 21:00:05,613 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-05 21:00:05,616 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-05 21:00:05,617 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:00:05" (1/1) ... [2023-12-05 21:00:05,618 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c8b51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:05, skipping insertion in model container [2023-12-05 21:00:05,618 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.12 09:00:05" (1/1) ... [2023-12-05 21:00:05,667 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-05 21:00:05,978 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:00:05,989 INFO L202 MainTranslator]: Completed pre-run [2023-12-05 21:00:06,025 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-05 21:00:06,052 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:00:06,052 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-12-05 21:00:06,059 INFO L206 MainTranslator]: Completed translation [2023-12-05 21:00:06,059 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06 WrapperNode [2023-12-05 21:00:06,059 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-05 21:00:06,061 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-05 21:00:06,061 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-05 21:00:06,061 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-05 21:00:06,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (1/1) ... [2023-12-05 21:00:06,090 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (1/1) ... [2023-12-05 21:00:06,107 INFO L138 Inliner]: procedures = 170, calls = 29, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2023-12-05 21:00:06,108 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-05 21:00:06,108 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-05 21:00:06,109 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-05 21:00:06,109 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-05 21:00:06,115 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (1/1) ... [2023-12-05 21:00:06,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (1/1) ... [2023-12-05 21:00:06,118 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (1/1) ... [2023-12-05 21:00:06,118 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (1/1) ... [2023-12-05 21:00:06,123 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (1/1) ... [2023-12-05 21:00:06,126 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (1/1) ... [2023-12-05 21:00:06,128 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (1/1) ... [2023-12-05 21:00:06,129 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (1/1) ... [2023-12-05 21:00:06,131 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-05 21:00:06,132 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-05 21:00:06,132 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-05 21:00:06,132 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-05 21:00:06,133 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (1/1) ... [2023-12-05 21:00:06,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-05 21:00:06,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:00:06,168 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-05 21:00:06,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-05 21:00:06,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-12-05 21:00:06,203 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-12-05 21:00:06,203 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-12-05 21:00:06,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-12-05 21:00:06,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-12-05 21:00:06,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-05 21:00:06,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-05 21:00:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-05 21:00:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-05 21:00:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-12-05 21:00:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-05 21:00:06,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-05 21:00:06,207 WARN L213 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-12-05 21:00:06,309 INFO L241 CfgBuilder]: Building ICFG [2023-12-05 21:00:06,311 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-05 21:00:06,482 INFO L282 CfgBuilder]: Performing block encoding [2023-12-05 21:00:06,669 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-05 21:00:06,670 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-05 21:00:06,671 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:00:06 BoogieIcfgContainer [2023-12-05 21:00:06,671 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-05 21:00:06,673 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-05 21:00:06,673 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-05 21:00:06,676 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-05 21:00:06,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.12 09:00:05" (1/3) ... [2023-12-05 21:00:06,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147cf1a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:00:06, skipping insertion in model container [2023-12-05 21:00:06,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.12 09:00:06" (2/3) ... [2023-12-05 21:00:06,677 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@147cf1a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.12 09:00:06, skipping insertion in model container [2023-12-05 21:00:06,677 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.12 09:00:06" (3/3) ... [2023-12-05 21:00:06,679 INFO L112 eAbstractionObserver]: Analyzing ICFG 02_inc_cas.i [2023-12-05 21:00:06,692 INFO L197 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-05 21:00:06,692 INFO L156 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-12-05 21:00:06,693 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-12-05 21:00:06,779 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:00:06,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 136 flow [2023-12-05 21:00:06,849 INFO L124 PetriNetUnfolderBase]: 5/79 cut-off events. [2023-12-05 21:00:06,850 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:00:06,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 79 events. 5/79 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 226 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 52. Up to 4 conditions per place. [2023-12-05 21:00:06,855 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 136 flow [2023-12-05 21:00:06,858 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 65 places, 66 transitions, 136 flow [2023-12-05 21:00:06,867 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:00:06,873 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4ba37073, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:00:06,874 INFO L363 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-12-05 21:00:06,879 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:00:06,879 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:00:06,879 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:00:06,879 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:06,880 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:06,880 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-05 21:00:06,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:06,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1314413243, now seen corresponding path program 1 times [2023-12-05 21:00:06,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:06,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523264290] [2023-12-05 21:00:06,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:06,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:07,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:07,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523264290] [2023-12-05 21:00:07,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523264290] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:07,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:07,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:00:07,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978023669] [2023-12-05 21:00:07,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:07,187 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:00:07,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:07,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:00:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:00:07,221 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2023-12-05 21:00:07,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:07,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2023-12-05 21:00:07,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:07,373 INFO L124 PetriNetUnfolderBase]: 40/162 cut-off events. [2023-12-05 21:00:07,373 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:00:07,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270 conditions, 162 events. 40/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 870 event pairs, 32 based on Foata normal form. 20/120 useless extension candidates. Maximal degree in co-relation 235. Up to 88 conditions per place. [2023-12-05 21:00:07,378 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 26 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-12-05 21:00:07,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 180 flow [2023-12-05 21:00:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:00:07,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:00:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 128 transitions. [2023-12-05 21:00:07,392 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2023-12-05 21:00:07,393 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 128 transitions. [2023-12-05 21:00:07,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 128 transitions. [2023-12-05 21:00:07,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:07,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 128 transitions. [2023-12-05 21:00:07,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,406 INFO L308 CegarLoopForPetriNet]: 65 programPoint places, -6 predicate places. [2023-12-05 21:00:07,406 INFO L500 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 180 flow [2023-12-05 21:00:07,407 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,407 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:07,407 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:07,407 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-05 21:00:07,407 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-05 21:00:07,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:07,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1314413244, now seen corresponding path program 1 times [2023-12-05 21:00:07,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:07,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041416246] [2023-12-05 21:00:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:07,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:07,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:07,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:07,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041416246] [2023-12-05 21:00:07,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041416246] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:07,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:07,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:00:07,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711995653] [2023-12-05 21:00:07,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:07,549 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:00:07,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:07,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:00:07,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:00:07,552 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2023-12-05 21:00:07,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:07,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2023-12-05 21:00:07,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:07,634 INFO L124 PetriNetUnfolderBase]: 21/112 cut-off events. [2023-12-05 21:00:07,635 INFO L125 PetriNetUnfolderBase]: For 15/17 co-relation queries the response was YES. [2023-12-05 21:00:07,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 112 events. 21/112 cut-off events. For 15/17 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 484 event pairs, 17 based on Foata normal form. 0/85 useless extension candidates. Maximal degree in co-relation 204. Up to 57 conditions per place. [2023-12-05 21:00:07,636 INFO L140 encePairwiseOnDemand]: 64/66 looper letters, 24 selfloop transitions, 1 changer transitions 0/56 dead transitions. [2023-12-05 21:00:07,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 56 transitions, 222 flow [2023-12-05 21:00:07,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:00:07,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:00:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2023-12-05 21:00:07,640 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6262626262626263 [2023-12-05 21:00:07,640 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 124 transitions. [2023-12-05 21:00:07,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 124 transitions. [2023-12-05 21:00:07,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:07,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 124 transitions. [2023-12-05 21:00:07,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,644 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 66.0) internal successors, (264), 4 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,644 INFO L308 CegarLoopForPetriNet]: 65 programPoint places, -5 predicate places. [2023-12-05 21:00:07,645 INFO L500 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 222 flow [2023-12-05 21:00:07,645 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,645 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:07,645 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:07,645 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-05 21:00:07,646 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-05 21:00:07,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:07,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1955941897, now seen corresponding path program 1 times [2023-12-05 21:00:07,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:07,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512275899] [2023-12-05 21:00:07,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:07,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:07,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:07,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:07,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512275899] [2023-12-05 21:00:07,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512275899] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:07,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:07,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:00:07,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332249995] [2023-12-05 21:00:07,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:07,828 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:00:07,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:07,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:00:07,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:00:07,837 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2023-12-05 21:00:07,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 222 flow. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:07,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2023-12-05 21:00:07,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:07,923 INFO L124 PetriNetUnfolderBase]: 18/103 cut-off events. [2023-12-05 21:00:07,924 INFO L125 PetriNetUnfolderBase]: For 43/47 co-relation queries the response was YES. [2023-12-05 21:00:07,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 103 events. 18/103 cut-off events. For 43/47 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 411 event pairs, 14 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 226. Up to 48 conditions per place. [2023-12-05 21:00:07,929 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 22 selfloop transitions, 5 changer transitions 0/53 dead transitions. [2023-12-05 21:00:07,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 53 transitions, 258 flow [2023-12-05 21:00:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-05 21:00:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-12-05 21:00:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 170 transitions. [2023-12-05 21:00:07,933 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2023-12-05 21:00:07,933 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 170 transitions. [2023-12-05 21:00:07,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 170 transitions. [2023-12-05 21:00:07,934 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:07,934 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 170 transitions. [2023-12-05 21:00:07,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,938 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 66.0) internal successors, (396), 6 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,939 INFO L308 CegarLoopForPetriNet]: 65 programPoint places, -4 predicate places. [2023-12-05 21:00:07,939 INFO L500 AbstractCegarLoop]: Abstraction has has 61 places, 53 transitions, 258 flow [2023-12-05 21:00:07,940 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:07,940 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:07,940 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:07,940 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-05 21:00:07,941 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-05 21:00:07,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:07,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1955941896, now seen corresponding path program 1 times [2023-12-05 21:00:07,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:07,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246843225] [2023-12-05 21:00:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:07,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:07,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:08,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:08,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:08,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246843225] [2023-12-05 21:00:08,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246843225] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:08,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:08,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:00:08,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502458702] [2023-12-05 21:00:08,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:08,197 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:00:08,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:08,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:00:08,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:00:08,199 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2023-12-05 21:00:08,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 53 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 28.714285714285715) internal successors, (201), 7 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:08,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:08,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2023-12-05 21:00:08,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:08,284 INFO L124 PetriNetUnfolderBase]: 15/94 cut-off events. [2023-12-05 21:00:08,285 INFO L125 PetriNetUnfolderBase]: For 84/90 co-relation queries the response was YES. [2023-12-05 21:00:08,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 94 events. 15/94 cut-off events. For 84/90 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 330 event pairs, 11 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 232. Up to 39 conditions per place. [2023-12-05 21:00:08,288 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 20 selfloop transitions, 5 changer transitions 0/50 dead transitions. [2023-12-05 21:00:08,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 50 transitions, 284 flow [2023-12-05 21:00:08,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:00:08,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:00:08,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2023-12-05 21:00:08,290 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2023-12-05 21:00:08,290 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 190 transitions. [2023-12-05 21:00:08,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 190 transitions. [2023-12-05 21:00:08,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:08,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 190 transitions. [2023-12-05 21:00:08,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 31.666666666666668) internal successors, (190), 6 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:08,293 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:08,294 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:08,296 INFO L308 CegarLoopForPetriNet]: 65 programPoint places, -2 predicate places. [2023-12-05 21:00:08,296 INFO L500 AbstractCegarLoop]: Abstraction has has 63 places, 50 transitions, 284 flow [2023-12-05 21:00:08,296 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 28.714285714285715) internal successors, (201), 7 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:08,298 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:08,298 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:08,298 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-05 21:00:08,298 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2023-12-05 21:00:08,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:08,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1974555645, now seen corresponding path program 1 times [2023-12-05 21:00:08,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:08,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796520501] [2023-12-05 21:00:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:08,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:00:08,317 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:00:08,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:00:08,346 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:00:08,346 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:00:08,347 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2023-12-05 21:00:08,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 31 remaining) [2023-12-05 21:00:08,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 31 remaining) [2023-12-05 21:00:08,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 31 remaining) [2023-12-05 21:00:08,349 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 31 remaining) [2023-12-05 21:00:08,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 31 remaining) [2023-12-05 21:00:08,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 31 remaining) [2023-12-05 21:00:08,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 31 remaining) [2023-12-05 21:00:08,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 31 remaining) [2023-12-05 21:00:08,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 31 remaining) [2023-12-05 21:00:08,350 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 31 remaining) [2023-12-05 21:00:08,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 31 remaining) [2023-12-05 21:00:08,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 31 remaining) [2023-12-05 21:00:08,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 31 remaining) [2023-12-05 21:00:08,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 31 remaining) [2023-12-05 21:00:08,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 31 remaining) [2023-12-05 21:00:08,351 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 31 remaining) [2023-12-05 21:00:08,352 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 31 remaining) [2023-12-05 21:00:08,352 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 31 remaining) [2023-12-05 21:00:08,352 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 31 remaining) [2023-12-05 21:00:08,352 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 31 remaining) [2023-12-05 21:00:08,352 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 31 remaining) [2023-12-05 21:00:08,352 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 31 remaining) [2023-12-05 21:00:08,353 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 31 remaining) [2023-12-05 21:00:08,353 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 31 remaining) [2023-12-05 21:00:08,353 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 31 remaining) [2023-12-05 21:00:08,356 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 31 remaining) [2023-12-05 21:00:08,356 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 31 remaining) [2023-12-05 21:00:08,357 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 31 remaining) [2023-12-05 21:00:08,357 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 31 remaining) [2023-12-05 21:00:08,357 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 31 remaining) [2023-12-05 21:00:08,358 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-05 21:00:08,358 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-12-05 21:00:08,360 WARN L227 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:00:08,360 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-12-05 21:00:08,428 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:00:08,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 104 transitions, 218 flow [2023-12-05 21:00:08,454 INFO L124 PetriNetUnfolderBase]: 9/132 cut-off events. [2023-12-05 21:00:08,454 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-12-05 21:00:08,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 132 events. 9/132 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 460 event pairs, 0 based on Foata normal form. 0/86 useless extension candidates. Maximal degree in co-relation 89. Up to 6 conditions per place. [2023-12-05 21:00:08,459 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 104 transitions, 218 flow [2023-12-05 21:00:08,462 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 104 transitions, 218 flow [2023-12-05 21:00:08,463 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:00:08,464 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4ba37073, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:00:08,464 INFO L363 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-12-05 21:00:08,466 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:00:08,466 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:00:08,466 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:00:08,467 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:08,467 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:08,467 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:00:08,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:08,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1725054277, now seen corresponding path program 1 times [2023-12-05 21:00:08,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:08,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550170199] [2023-12-05 21:00:08,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:08,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:08,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:08,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:08,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550170199] [2023-12-05 21:00:08,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550170199] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:08,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:08,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:00:08,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46998160] [2023-12-05 21:00:08,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:08,505 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:00:08,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:08,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:00:08,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:00:08,506 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 104 [2023-12-05 21:00:08,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 104 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:08,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:08,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 104 [2023-12-05 21:00:08,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:09,107 INFO L124 PetriNetUnfolderBase]: 2065/4394 cut-off events. [2023-12-05 21:00:09,107 INFO L125 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2023-12-05 21:00:09,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7717 conditions, 4394 events. 2065/4394 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 40883 event pairs, 1526 based on Foata normal form. 413/2745 useless extension candidates. Maximal degree in co-relation 2489. Up to 2585 conditions per place. [2023-12-05 21:00:09,146 INFO L140 encePairwiseOnDemand]: 89/104 looper letters, 80 selfloop transitions, 6 changer transitions 0/130 dead transitions. [2023-12-05 21:00:09,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 447 flow [2023-12-05 21:00:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:00:09,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:00:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 241 transitions. [2023-12-05 21:00:09,148 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7724358974358975 [2023-12-05 21:00:09,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 241 transitions. [2023-12-05 21:00:09,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 241 transitions. [2023-12-05 21:00:09,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:09,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 241 transitions. [2023-12-05 21:00:09,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:09,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:09,150 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:09,153 INFO L308 CegarLoopForPetriNet]: 102 programPoint places, -8 predicate places. [2023-12-05 21:00:09,153 INFO L500 AbstractCegarLoop]: Abstraction has has 94 places, 130 transitions, 447 flow [2023-12-05 21:00:09,157 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:09,157 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:09,157 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:09,157 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-05 21:00:09,158 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:00:09,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:09,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1725054276, now seen corresponding path program 1 times [2023-12-05 21:00:09,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:09,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794410555] [2023-12-05 21:00:09,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:09,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:09,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:09,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794410555] [2023-12-05 21:00:09,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794410555] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:09,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:09,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:00:09,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410760955] [2023-12-05 21:00:09,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:09,209 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:00:09,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:09,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:00:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:00:09,211 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 104 [2023-12-05 21:00:09,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 130 transitions, 447 flow. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:09,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:09,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 104 [2023-12-05 21:00:09,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:09,686 INFO L124 PetriNetUnfolderBase]: 1382/3106 cut-off events. [2023-12-05 21:00:09,686 INFO L125 PetriNetUnfolderBase]: For 463/556 co-relation queries the response was YES. [2023-12-05 21:00:09,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7418 conditions, 3106 events. 1382/3106 cut-off events. For 463/556 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 27559 event pairs, 1043 based on Foata normal form. 0/1987 useless extension candidates. Maximal degree in co-relation 2546. Up to 2021 conditions per place. [2023-12-05 21:00:09,715 INFO L140 encePairwiseOnDemand]: 102/104 looper letters, 72 selfloop transitions, 1 changer transitions 0/128 dead transitions. [2023-12-05 21:00:09,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 128 transitions, 585 flow [2023-12-05 21:00:09,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:00:09,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:00:09,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 195 transitions. [2023-12-05 21:00:09,717 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.625 [2023-12-05 21:00:09,717 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 195 transitions. [2023-12-05 21:00:09,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 195 transitions. [2023-12-05 21:00:09,718 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:09,718 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 195 transitions. [2023-12-05 21:00:09,718 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.0) internal successors, (195), 3 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:09,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:09,719 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:09,720 INFO L308 CegarLoopForPetriNet]: 102 programPoint places, -7 predicate places. [2023-12-05 21:00:09,721 INFO L500 AbstractCegarLoop]: Abstraction has has 95 places, 128 transitions, 585 flow [2023-12-05 21:00:09,721 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:09,721 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:09,721 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:09,721 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-05 21:00:09,721 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:00:09,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:09,722 INFO L85 PathProgramCache]: Analyzing trace with hash 590517975, now seen corresponding path program 1 times [2023-12-05 21:00:09,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:09,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994640543] [2023-12-05 21:00:09,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:09,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:09,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:09,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:09,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:09,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994640543] [2023-12-05 21:00:09,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994640543] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:09,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:09,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:00:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101503400] [2023-12-05 21:00:09,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:09,859 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:00:09,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:09,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:00:09,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:00:09,861 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 104 [2023-12-05 21:00:09,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 128 transitions, 585 flow. Second operand has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:09,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:09,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 104 [2023-12-05 21:00:09,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:10,405 INFO L124 PetriNetUnfolderBase]: 1181/2977 cut-off events. [2023-12-05 21:00:10,406 INFO L125 PetriNetUnfolderBase]: For 1045/1212 co-relation queries the response was YES. [2023-12-05 21:00:10,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8946 conditions, 2977 events. 1181/2977 cut-off events. For 1045/1212 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 27494 event pairs, 664 based on Foata normal form. 8/1999 useless extension candidates. Maximal degree in co-relation 2999. Up to 1832 conditions per place. [2023-12-05 21:00:10,445 INFO L140 encePairwiseOnDemand]: 77/104 looper letters, 134 selfloop transitions, 43 changer transitions 0/219 dead transitions. [2023-12-05 21:00:10,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 219 transitions, 1454 flow [2023-12-05 21:00:10,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:00:10,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:00:10,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 386 transitions. [2023-12-05 21:00:10,447 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6185897435897436 [2023-12-05 21:00:10,447 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 386 transitions. [2023-12-05 21:00:10,447 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 386 transitions. [2023-12-05 21:00:10,447 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:10,448 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 386 transitions. [2023-12-05 21:00:10,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 64.33333333333333) internal successors, (386), 6 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:10,450 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:10,450 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:10,451 INFO L308 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2023-12-05 21:00:10,451 INFO L500 AbstractCegarLoop]: Abstraction has has 100 places, 219 transitions, 1454 flow [2023-12-05 21:00:10,452 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 46.0) internal successors, (276), 6 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:10,452 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:10,452 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:10,452 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-05 21:00:10,452 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:00:10,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:10,453 INFO L85 PathProgramCache]: Analyzing trace with hash 590517976, now seen corresponding path program 1 times [2023-12-05 21:00:10,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:10,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449417345] [2023-12-05 21:00:10,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:10,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:10,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:10,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:10,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449417345] [2023-12-05 21:00:10,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449417345] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:10,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:10,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:00:10,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600271175] [2023-12-05 21:00:10,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:10,640 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:00:10,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:10,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:00:10,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:00:10,641 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 104 [2023-12-05 21:00:10,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 219 transitions, 1454 flow. Second operand has 7 states, 7 states have (on average 43.714285714285715) internal successors, (306), 7 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:10,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:10,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 104 [2023-12-05 21:00:10,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:11,074 INFO L124 PetriNetUnfolderBase]: 860/2292 cut-off events. [2023-12-05 21:00:11,075 INFO L125 PetriNetUnfolderBase]: For 1621/1819 co-relation queries the response was YES. [2023-12-05 21:00:11,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8116 conditions, 2292 events. 860/2292 cut-off events. For 1621/1819 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 20239 event pairs, 423 based on Foata normal form. 16/1703 useless extension candidates. Maximal degree in co-relation 2793. Up to 1289 conditions per place. [2023-12-05 21:00:11,099 INFO L140 encePairwiseOnDemand]: 77/104 looper letters, 108 selfloop transitions, 43 changer transitions 0/191 dead transitions. [2023-12-05 21:00:11,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 191 transitions, 1524 flow [2023-12-05 21:00:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:00:11,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:00:11,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 337 transitions. [2023-12-05 21:00:11,104 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5400641025641025 [2023-12-05 21:00:11,104 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 337 transitions. [2023-12-05 21:00:11,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 337 transitions. [2023-12-05 21:00:11,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:11,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 337 transitions. [2023-12-05 21:00:11,106 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 56.166666666666664) internal successors, (337), 6 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:11,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:11,107 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 104.0) internal successors, (728), 7 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:11,109 INFO L308 CegarLoopForPetriNet]: 102 programPoint places, -3 predicate places. [2023-12-05 21:00:11,109 INFO L500 AbstractCegarLoop]: Abstraction has has 99 places, 191 transitions, 1524 flow [2023-12-05 21:00:11,109 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 43.714285714285715) internal successors, (306), 7 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:11,109 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:11,109 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:11,109 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-05 21:00:11,110 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:00:11,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:11,110 INFO L85 PathProgramCache]: Analyzing trace with hash -64588348, now seen corresponding path program 1 times [2023-12-05 21:00:11,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:11,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772532887] [2023-12-05 21:00:11,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:11,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:11,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:11,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772532887] [2023-12-05 21:00:11,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772532887] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:11,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:11,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:00:11,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619398281] [2023-12-05 21:00:11,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:11,192 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:00:11,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:00:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:00:11,193 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 104 [2023-12-05 21:00:11,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 191 transitions, 1524 flow. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:11,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:11,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 104 [2023-12-05 21:00:11,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:11,646 INFO L124 PetriNetUnfolderBase]: 1073/2615 cut-off events. [2023-12-05 21:00:11,646 INFO L125 PetriNetUnfolderBase]: For 3073/3137 co-relation queries the response was YES. [2023-12-05 21:00:11,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10596 conditions, 2615 events. 1073/2615 cut-off events. For 3073/3137 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 23040 event pairs, 144 based on Foata normal form. 34/1990 useless extension candidates. Maximal degree in co-relation 9486. Up to 1380 conditions per place. [2023-12-05 21:00:11,672 INFO L140 encePairwiseOnDemand]: 94/104 looper letters, 162 selfloop transitions, 17 changer transitions 0/222 dead transitions. [2023-12-05 21:00:11,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 222 transitions, 2189 flow [2023-12-05 21:00:11,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:00:11,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:00:11,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 212 transitions. [2023-12-05 21:00:11,674 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6794871794871795 [2023-12-05 21:00:11,674 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 212 transitions. [2023-12-05 21:00:11,674 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 212 transitions. [2023-12-05 21:00:11,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:11,675 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 212 transitions. [2023-12-05 21:00:11,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:11,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:11,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:11,677 INFO L308 CegarLoopForPetriNet]: 102 programPoint places, -1 predicate places. [2023-12-05 21:00:11,678 INFO L500 AbstractCegarLoop]: Abstraction has has 101 places, 222 transitions, 2189 flow [2023-12-05 21:00:11,678 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:11,678 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:11,678 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:11,678 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-05 21:00:11,678 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:00:11,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:11,680 INFO L85 PathProgramCache]: Analyzing trace with hash -64588347, now seen corresponding path program 1 times [2023-12-05 21:00:11,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:11,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589451212] [2023-12-05 21:00:11,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:11,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:11,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:11,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589451212] [2023-12-05 21:00:11,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589451212] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:11,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:11,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:00:11,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625036623] [2023-12-05 21:00:11,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:11,761 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:00:11,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:11,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:00:11,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:00:11,763 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 104 [2023-12-05 21:00:11,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 222 transitions, 2189 flow. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:11,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:11,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 104 [2023-12-05 21:00:11,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:12,178 INFO L124 PetriNetUnfolderBase]: 929/2340 cut-off events. [2023-12-05 21:00:12,178 INFO L125 PetriNetUnfolderBase]: For 4958/5058 co-relation queries the response was YES. [2023-12-05 21:00:12,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10316 conditions, 2340 events. 929/2340 cut-off events. For 4958/5058 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 20396 event pairs, 58 based on Foata normal form. 46/1998 useless extension candidates. Maximal degree in co-relation 9155. Up to 1119 conditions per place. [2023-12-05 21:00:12,207 INFO L140 encePairwiseOnDemand]: 98/104 looper letters, 185 selfloop transitions, 5 changer transitions 0/254 dead transitions. [2023-12-05 21:00:12,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 254 transitions, 2959 flow [2023-12-05 21:00:12,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:00:12,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:00:12,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 206 transitions. [2023-12-05 21:00:12,209 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6602564102564102 [2023-12-05 21:00:12,209 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 206 transitions. [2023-12-05 21:00:12,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 206 transitions. [2023-12-05 21:00:12,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:12,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 206 transitions. [2023-12-05 21:00:12,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:12,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:12,211 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:12,211 INFO L308 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2023-12-05 21:00:12,211 INFO L500 AbstractCegarLoop]: Abstraction has has 100 places, 254 transitions, 2959 flow [2023-12-05 21:00:12,212 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:12,212 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:12,212 INFO L233 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:12,212 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-05 21:00:12,212 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2023-12-05 21:00:12,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:12,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2010249708, now seen corresponding path program 1 times [2023-12-05 21:00:12,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:12,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490712406] [2023-12-05 21:00:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:12,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:12,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:00:12,225 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-05 21:00:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-05 21:00:12,234 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-05 21:00:12,235 INFO L372 BasicCegarLoop]: Counterexample is feasible [2023-12-05 21:00:12,235 INFO L810 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (44 of 45 remaining) [2023-12-05 21:00:12,235 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 45 remaining) [2023-12-05 21:00:12,235 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 45 remaining) [2023-12-05 21:00:12,235 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 45 remaining) [2023-12-05 21:00:12,236 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 45 remaining) [2023-12-05 21:00:12,236 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 45 remaining) [2023-12-05 21:00:12,236 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 45 remaining) [2023-12-05 21:00:12,236 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 45 remaining) [2023-12-05 21:00:12,236 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 45 remaining) [2023-12-05 21:00:12,236 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 45 remaining) [2023-12-05 21:00:12,236 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 45 remaining) [2023-12-05 21:00:12,236 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 45 remaining) [2023-12-05 21:00:12,237 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 45 remaining) [2023-12-05 21:00:12,237 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 45 remaining) [2023-12-05 21:00:12,237 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 45 remaining) [2023-12-05 21:00:12,237 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 45 remaining) [2023-12-05 21:00:12,237 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 45 remaining) [2023-12-05 21:00:12,237 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 45 remaining) [2023-12-05 21:00:12,237 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 45 remaining) [2023-12-05 21:00:12,237 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 45 remaining) [2023-12-05 21:00:12,237 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 45 remaining) [2023-12-05 21:00:12,238 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 45 remaining) [2023-12-05 21:00:12,238 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 45 remaining) [2023-12-05 21:00:12,238 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 45 remaining) [2023-12-05 21:00:12,238 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 45 remaining) [2023-12-05 21:00:12,238 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 45 remaining) [2023-12-05 21:00:12,238 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 45 remaining) [2023-12-05 21:00:12,238 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 45 remaining) [2023-12-05 21:00:12,238 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 45 remaining) [2023-12-05 21:00:12,239 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 45 remaining) [2023-12-05 21:00:12,239 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 45 remaining) [2023-12-05 21:00:12,239 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 45 remaining) [2023-12-05 21:00:12,239 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 45 remaining) [2023-12-05 21:00:12,239 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 45 remaining) [2023-12-05 21:00:12,239 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 45 remaining) [2023-12-05 21:00:12,239 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 45 remaining) [2023-12-05 21:00:12,239 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 45 remaining) [2023-12-05 21:00:12,240 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 45 remaining) [2023-12-05 21:00:12,240 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 45 remaining) [2023-12-05 21:00:12,240 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 45 remaining) [2023-12-05 21:00:12,240 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 45 remaining) [2023-12-05 21:00:12,240 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 45 remaining) [2023-12-05 21:00:12,240 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 45 remaining) [2023-12-05 21:00:12,240 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 45 remaining) [2023-12-05 21:00:12,240 INFO L810 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 45 remaining) [2023-12-05 21:00:12,241 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-05 21:00:12,241 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:12,241 WARN L227 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-12-05 21:00:12,241 INFO L508 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-12-05 21:00:12,297 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-12-05 21:00:12,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 142 transitions, 302 flow [2023-12-05 21:00:12,316 INFO L124 PetriNetUnfolderBase]: 13/185 cut-off events. [2023-12-05 21:00:12,316 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-12-05 21:00:12,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 185 events. 13/185 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 699 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 136. Up to 8 conditions per place. [2023-12-05 21:00:12,317 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 142 transitions, 302 flow [2023-12-05 21:00:12,319 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 139 places, 142 transitions, 302 flow [2023-12-05 21:00:12,320 INFO L361 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-05 21:00:12,321 INFO L362 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4ba37073, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-05 21:00:12,321 INFO L363 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2023-12-05 21:00:12,322 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-12-05 21:00:12,322 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-12-05 21:00:12,322 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-12-05 21:00:12,322 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:12,322 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:12,322 INFO L425 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-12-05 21:00:12,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:12,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1332342597, now seen corresponding path program 1 times [2023-12-05 21:00:12,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:12,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40240488] [2023-12-05 21:00:12,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:12,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:12,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:12,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40240488] [2023-12-05 21:00:12,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40240488] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:12,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:12,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:00:12,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388557033] [2023-12-05 21:00:12,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:12,371 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:00:12,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:12,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:00:12,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:00:12,372 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 142 [2023-12-05 21:00:12,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 142 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:12,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:12,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 142 [2023-12-05 21:00:12,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:23,772 INFO L124 PetriNetUnfolderBase]: 69101/117596 cut-off events. [2023-12-05 21:00:23,772 INFO L125 PetriNetUnfolderBase]: For 5643/5643 co-relation queries the response was YES. [2023-12-05 21:00:24,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212495 conditions, 117596 events. 69101/117596 cut-off events. For 5643/5643 co-relation queries the response was YES. Maximal size of possible extension queue 10076. Compared 1300569 event pairs, 46770 based on Foata normal form. 8458/67571 useless extension candidates. Maximal degree in co-relation 13905. Up to 66718 conditions per place. [2023-12-05 21:00:25,222 INFO L140 encePairwiseOnDemand]: 122/142 looper letters, 116 selfloop transitions, 8 changer transitions 0/184 dead transitions. [2023-12-05 21:00:25,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 184 transitions, 646 flow [2023-12-05 21:00:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:00:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:00:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-12-05 21:00:25,225 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7816901408450704 [2023-12-05 21:00:25,226 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-12-05 21:00:25,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-12-05 21:00:25,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:25,226 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-12-05 21:00:25,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:25,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:25,229 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:25,230 INFO L308 CegarLoopForPetriNet]: 139 programPoint places, -10 predicate places. [2023-12-05 21:00:25,230 INFO L500 AbstractCegarLoop]: Abstraction has has 129 places, 184 transitions, 646 flow [2023-12-05 21:00:25,230 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:25,230 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:25,231 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:25,231 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-12-05 21:00:25,231 INFO L425 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-12-05 21:00:25,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:25,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1332342596, now seen corresponding path program 1 times [2023-12-05 21:00:25,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:25,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908440247] [2023-12-05 21:00:25,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:25,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:25,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:25,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:25,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908440247] [2023-12-05 21:00:25,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908440247] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:25,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:25,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:00:25,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048032237] [2023-12-05 21:00:25,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:25,291 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:00:25,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:25,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:00:25,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:00:25,292 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 142 [2023-12-05 21:00:25,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 184 transitions, 646 flow. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:25,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:25,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 142 [2023-12-05 21:00:25,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:33,734 INFO L124 PetriNetUnfolderBase]: 51241/89137 cut-off events. [2023-12-05 21:00:33,734 INFO L125 PetriNetUnfolderBase]: For 16066/18150 co-relation queries the response was YES. [2023-12-05 21:00:34,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221258 conditions, 89137 events. 51241/89137 cut-off events. For 16066/18150 co-relation queries the response was YES. Maximal size of possible extension queue 7196. Compared 968234 event pairs, 35349 based on Foata normal form. 0/53199 useless extension candidates. Maximal degree in co-relation 16209. Up to 61830 conditions per place. [2023-12-05 21:00:34,693 INFO L140 encePairwiseOnDemand]: 140/142 looper letters, 105 selfloop transitions, 1 changer transitions 0/182 dead transitions. [2023-12-05 21:00:34,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 182 transitions, 850 flow [2023-12-05 21:00:34,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:00:34,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:00:34,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-12-05 21:00:34,695 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6244131455399061 [2023-12-05 21:00:34,695 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-12-05 21:00:34,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-12-05 21:00:34,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:34,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-12-05 21:00:34,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:34,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:34,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:34,698 INFO L308 CegarLoopForPetriNet]: 139 programPoint places, -9 predicate places. [2023-12-05 21:00:34,698 INFO L500 AbstractCegarLoop]: Abstraction has has 130 places, 182 transitions, 850 flow [2023-12-05 21:00:34,698 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:34,698 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:34,698 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:34,699 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-12-05 21:00:34,699 INFO L425 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-12-05 21:00:34,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:34,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1815058706, now seen corresponding path program 1 times [2023-12-05 21:00:34,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:34,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680508168] [2023-12-05 21:00:34,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:34,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:34,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:34,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:34,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680508168] [2023-12-05 21:00:34,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680508168] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:34,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:34,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-05 21:00:34,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520660326] [2023-12-05 21:00:34,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:34,785 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:00:34,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:34,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:00:34,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-12-05 21:00:34,788 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 142 [2023-12-05 21:00:34,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 182 transitions, 850 flow. Second operand has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:34,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:34,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 142 [2023-12-05 21:00:34,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:44,156 INFO L124 PetriNetUnfolderBase]: 47827/91213 cut-off events. [2023-12-05 21:00:44,157 INFO L125 PetriNetUnfolderBase]: For 32849/37503 co-relation queries the response was YES. [2023-12-05 21:00:44,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 290128 conditions, 91213 events. 47827/91213 cut-off events. For 32849/37503 co-relation queries the response was YES. Maximal size of possible extension queue 7840. Compared 1089692 event pairs, 18240 based on Foata normal form. 386/57243 useless extension candidates. Maximal degree in co-relation 26700. Up to 60959 conditions per place. [2023-12-05 21:00:45,062 INFO L140 encePairwiseOnDemand]: 103/142 looper letters, 204 selfloop transitions, 63 changer transitions 0/325 dead transitions. [2023-12-05 21:00:45,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 325 transitions, 2214 flow [2023-12-05 21:00:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:00:45,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:00:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 541 transitions. [2023-12-05 21:00:45,064 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6349765258215962 [2023-12-05 21:00:45,064 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 541 transitions. [2023-12-05 21:00:45,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 541 transitions. [2023-12-05 21:00:45,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:45,065 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 541 transitions. [2023-12-05 21:00:45,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:45,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:45,068 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:45,068 INFO L308 CegarLoopForPetriNet]: 139 programPoint places, -4 predicate places. [2023-12-05 21:00:45,068 INFO L500 AbstractCegarLoop]: Abstraction has has 135 places, 325 transitions, 2214 flow [2023-12-05 21:00:45,068 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:45,068 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:45,069 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:45,069 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-05 21:00:45,069 INFO L425 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-12-05 21:00:45,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:45,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1815058707, now seen corresponding path program 1 times [2023-12-05 21:00:45,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:45,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465520597] [2023-12-05 21:00:45,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:45,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:45,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:45,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465520597] [2023-12-05 21:00:45,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465520597] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:45,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:45,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-05 21:00:45,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758305496] [2023-12-05 21:00:45,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:45,184 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-05 21:00:45,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:45,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-05 21:00:45,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-05 21:00:45,185 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 142 [2023-12-05 21:00:45,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 325 transitions, 2214 flow. Second operand has 7 states, 7 states have (on average 58.714285714285715) internal successors, (411), 7 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:45,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:45,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 142 [2023-12-05 21:00:45,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:00:52,127 INFO L124 PetriNetUnfolderBase]: 30494/60408 cut-off events. [2023-12-05 21:00:52,128 INFO L125 PetriNetUnfolderBase]: For 39320/44690 co-relation queries the response was YES. [2023-12-05 21:00:52,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230169 conditions, 60408 events. 30494/60408 cut-off events. For 39320/44690 co-relation queries the response was YES. Maximal size of possible extension queue 5234. Compared 704685 event pairs, 9591 based on Foata normal form. 668/42929 useless extension candidates. Maximal degree in co-relation 23648. Up to 37497 conditions per place. [2023-12-05 21:00:52,867 INFO L140 encePairwiseOnDemand]: 103/142 looper letters, 165 selfloop transitions, 63 changer transitions 0/283 dead transitions. [2023-12-05 21:00:52,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 283 transitions, 2322 flow [2023-12-05 21:00:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:00:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:00:52,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 464 transitions. [2023-12-05 21:00:52,869 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5446009389671361 [2023-12-05 21:00:52,869 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 464 transitions. [2023-12-05 21:00:52,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 464 transitions. [2023-12-05 21:00:52,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:00:52,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 464 transitions. [2023-12-05 21:00:52,870 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.33333333333333) internal successors, (464), 6 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:52,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:52,872 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:52,873 INFO L308 CegarLoopForPetriNet]: 139 programPoint places, -8 predicate places. [2023-12-05 21:00:52,873 INFO L500 AbstractCegarLoop]: Abstraction has has 131 places, 283 transitions, 2322 flow [2023-12-05 21:00:52,873 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 58.714285714285715) internal successors, (411), 7 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:52,873 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:00:52,873 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:00:52,873 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-05 21:00:52,873 INFO L425 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-12-05 21:00:52,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:00:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1223742345, now seen corresponding path program 1 times [2023-12-05 21:00:52,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:00:52,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679479446] [2023-12-05 21:00:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:00:52,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:00:52,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:00:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:00:52,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:00:52,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679479446] [2023-12-05 21:00:52,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679479446] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:00:52,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:00:52,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:00:52,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628536542] [2023-12-05 21:00:52,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:00:52,918 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:00:52,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:00:52,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:00:52,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:00:52,919 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 142 [2023-12-05 21:00:52,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 283 transitions, 2322 flow. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:00:52,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:00:52,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 142 [2023-12-05 21:00:52,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:01:01,354 INFO L124 PetriNetUnfolderBase]: 40704/77771 cut-off events. [2023-12-05 21:01:01,354 INFO L125 PetriNetUnfolderBase]: For 83406/87228 co-relation queries the response was YES. [2023-12-05 21:01:01,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342518 conditions, 77771 events. 40704/77771 cut-off events. For 83406/87228 co-relation queries the response was YES. Maximal size of possible extension queue 6651. Compared 916415 event pairs, 4508 based on Foata normal form. 616/55752 useless extension candidates. Maximal degree in co-relation 114459. Up to 46010 conditions per place. [2023-12-05 21:01:02,509 INFO L140 encePairwiseOnDemand]: 130/142 looper letters, 351 selfloop transitions, 39 changer transitions 0/450 dead transitions. [2023-12-05 21:01:02,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 450 transitions, 4742 flow [2023-12-05 21:01:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:01:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:01:02,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 295 transitions. [2023-12-05 21:01:02,511 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6924882629107981 [2023-12-05 21:01:02,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 295 transitions. [2023-12-05 21:01:02,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 295 transitions. [2023-12-05 21:01:02,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:01:02,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 295 transitions. [2023-12-05 21:01:02,512 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:02,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:02,513 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:02,514 INFO L308 CegarLoopForPetriNet]: 139 programPoint places, -6 predicate places. [2023-12-05 21:01:02,514 INFO L500 AbstractCegarLoop]: Abstraction has has 133 places, 450 transitions, 4742 flow [2023-12-05 21:01:02,515 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 3 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:02,515 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:02,515 INFO L233 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:01:02,515 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-05 21:01:02,515 INFO L425 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-12-05 21:01:02,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:02,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1223742342, now seen corresponding path program 1 times [2023-12-05 21:01:02,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:02,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222405569] [2023-12-05 21:01:02,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:02,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:02,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:02,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-05 21:01:02,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:02,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222405569] [2023-12-05 21:01:02,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222405569] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:02,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:01:02,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:01:02,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549088485] [2023-12-05 21:01:02,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:02,582 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:01:02,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:02,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:01:02,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:01:02,582 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 142 [2023-12-05 21:01:02,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 450 transitions, 4742 flow. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:02,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:02,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 142 [2023-12-05 21:01:02,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:01:10,570 INFO L124 PetriNetUnfolderBase]: 34882/67887 cut-off events. [2023-12-05 21:01:10,570 INFO L125 PetriNetUnfolderBase]: For 121814/126856 co-relation queries the response was YES. [2023-12-05 21:01:10,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 331886 conditions, 67887 events. 34882/67887 cut-off events. For 121814/126856 co-relation queries the response was YES. Maximal size of possible extension queue 5589. Compared 796920 event pairs, 2135 based on Foata normal form. 1096/54389 useless extension candidates. Maximal degree in co-relation 109301. Up to 37679 conditions per place. [2023-12-05 21:01:11,402 INFO L140 encePairwiseOnDemand]: 136/142 looper letters, 403 selfloop transitions, 7 changer transitions 0/531 dead transitions. [2023-12-05 21:01:11,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 531 transitions, 6560 flow [2023-12-05 21:01:11,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:01:11,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:01:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 288 transitions. [2023-12-05 21:01:11,406 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.676056338028169 [2023-12-05 21:01:11,406 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 288 transitions. [2023-12-05 21:01:11,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 288 transitions. [2023-12-05 21:01:11,406 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:01:11,406 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 288 transitions. [2023-12-05 21:01:11,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:11,407 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:11,407 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:11,408 INFO L308 CegarLoopForPetriNet]: 139 programPoint places, -7 predicate places. [2023-12-05 21:01:11,408 INFO L500 AbstractCegarLoop]: Abstraction has has 132 places, 531 transitions, 6560 flow [2023-12-05 21:01:11,409 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 3 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:11,409 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:11,409 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:01:11,409 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-05 21:01:11,409 INFO L425 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-12-05 21:01:11,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:11,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1679968815, now seen corresponding path program 1 times [2023-12-05 21:01:11,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:11,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848978427] [2023-12-05 21:01:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:11,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:01:11,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:11,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848978427] [2023-12-05 21:01:11,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848978427] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:11,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:01:11,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-05 21:01:11,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650908979] [2023-12-05 21:01:11,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:11,477 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-05 21:01:11,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:11,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-05 21:01:11,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-05 21:01:11,478 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 142 [2023-12-05 21:01:11,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 531 transitions, 6560 flow. Second operand has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:11,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:11,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 142 [2023-12-05 21:01:11,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:01:22,029 INFO L124 PetriNetUnfolderBase]: 32730/66188 cut-off events. [2023-12-05 21:01:22,029 INFO L125 PetriNetUnfolderBase]: For 160406/167911 co-relation queries the response was YES. [2023-12-05 21:01:22,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369991 conditions, 66188 events. 32730/66188 cut-off events. For 160406/167911 co-relation queries the response was YES. Maximal size of possible extension queue 5305. Compared 795178 event pairs, 1133 based on Foata normal form. 2078/54238 useless extension candidates. Maximal degree in co-relation 119235. Up to 36321 conditions per place. [2023-12-05 21:01:22,964 INFO L140 encePairwiseOnDemand]: 127/142 looper letters, 629 selfloop transitions, 80 changer transitions 0/772 dead transitions. [2023-12-05 21:01:22,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 772 transitions, 11173 flow [2023-12-05 21:01:22,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-05 21:01:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-12-05 21:01:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 383 transitions. [2023-12-05 21:01:22,966 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6742957746478874 [2023-12-05 21:01:22,966 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 383 transitions. [2023-12-05 21:01:22,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 383 transitions. [2023-12-05 21:01:22,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:01:22,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 383 transitions. [2023-12-05 21:01:22,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 95.75) internal successors, (383), 4 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:22,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:22,969 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:22,970 INFO L308 CegarLoopForPetriNet]: 139 programPoint places, -4 predicate places. [2023-12-05 21:01:22,970 INFO L500 AbstractCegarLoop]: Abstraction has has 135 places, 772 transitions, 11173 flow [2023-12-05 21:01:22,970 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.0) internal successors, (248), 4 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:22,970 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:22,970 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:01:22,971 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-12-05 21:01:22,971 INFO L425 AbstractCegarLoop]: === Iteration 8 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-12-05 21:01:22,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:22,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1323855312, now seen corresponding path program 1 times [2023-12-05 21:01:22,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:22,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780567811] [2023-12-05 21:01:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:22,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-05 21:01:23,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:23,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780567811] [2023-12-05 21:01:23,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780567811] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:23,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:01:23,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:01:23,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802479833] [2023-12-05 21:01:23,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:23,045 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:01:23,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:23,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:01:23,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:01:23,046 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 142 [2023-12-05 21:01:23,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 772 transitions, 11173 flow. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:23,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:23,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 142 [2023-12-05 21:01:23,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:01:33,498 INFO L124 PetriNetUnfolderBase]: 36065/69912 cut-off events. [2023-12-05 21:01:33,499 INFO L125 PetriNetUnfolderBase]: For 261798/267408 co-relation queries the response was YES. [2023-12-05 21:01:33,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413711 conditions, 69912 events. 36065/69912 cut-off events. For 261798/267408 co-relation queries the response was YES. Maximal size of possible extension queue 5454. Compared 815226 event pairs, 881 based on Foata normal form. 1004/57672 useless extension candidates. Maximal degree in co-relation 340515. Up to 36280 conditions per place. [2023-12-05 21:01:34,672 INFO L140 encePairwiseOnDemand]: 136/142 looper letters, 891 selfloop transitions, 23 changer transitions 0/1053 dead transitions. [2023-12-05 21:01:34,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 1053 transitions, 17623 flow [2023-12-05 21:01:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:01:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:01:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 281 transitions. [2023-12-05 21:01:34,673 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6596244131455399 [2023-12-05 21:01:34,673 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 281 transitions. [2023-12-05 21:01:34,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 281 transitions. [2023-12-05 21:01:34,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:01:34,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 281 transitions. [2023-12-05 21:01:34,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:34,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:34,675 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:34,675 INFO L308 CegarLoopForPetriNet]: 139 programPoint places, -5 predicate places. [2023-12-05 21:01:34,675 INFO L500 AbstractCegarLoop]: Abstraction has has 134 places, 1053 transitions, 17623 flow [2023-12-05 21:01:34,675 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:34,675 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:34,675 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:01:34,675 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-12-05 21:01:34,675 INFO L425 AbstractCegarLoop]: === Iteration 9 === Targeting thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-12-05 21:01:34,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1323855309, now seen corresponding path program 1 times [2023-12-05 21:01:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:34,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972901121] [2023-12-05 21:01:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:34,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-05 21:01:34,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:34,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972901121] [2023-12-05 21:01:34,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972901121] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:34,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-05 21:01:34,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-05 21:01:34,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356559938] [2023-12-05 21:01:34,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:34,743 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-05 21:01:34,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:34,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-05 21:01:34,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-05 21:01:34,744 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 63 out of 142 [2023-12-05 21:01:34,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 1053 transitions, 17623 flow. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:34,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:34,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 63 of 142 [2023-12-05 21:01:34,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:01:49,292 INFO L124 PetriNetUnfolderBase]: 42041/81210 cut-off events. [2023-12-05 21:01:49,293 INFO L125 PetriNetUnfolderBase]: For 400285/411201 co-relation queries the response was YES. [2023-12-05 21:01:49,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 524793 conditions, 81210 events. 42041/81210 cut-off events. For 400285/411201 co-relation queries the response was YES. Maximal size of possible extension queue 6211. Compared 955855 event pairs, 1454 based on Foata normal form. 824/66992 useless extension candidates. Maximal degree in co-relation 434237. Up to 44176 conditions per place. [2023-12-05 21:01:50,596 INFO L140 encePairwiseOnDemand]: 130/142 looper letters, 1172 selfloop transitions, 116 changer transitions 0/1356 dead transitions. [2023-12-05 21:01:50,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 1356 transitions, 25377 flow [2023-12-05 21:01:50,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-05 21:01:50,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-12-05 21:01:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 284 transitions. [2023-12-05 21:01:50,599 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2023-12-05 21:01:50,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 284 transitions. [2023-12-05 21:01:50,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 284 transitions. [2023-12-05 21:01:50,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:01:50,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 284 transitions. [2023-12-05 21:01:50,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:50,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:50,600 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:50,601 INFO L308 CegarLoopForPetriNet]: 139 programPoint places, -3 predicate places. [2023-12-05 21:01:50,601 INFO L500 AbstractCegarLoop]: Abstraction has has 136 places, 1356 transitions, 25377 flow [2023-12-05 21:01:50,601 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:50,601 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:01:50,601 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:01:50,601 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-12-05 21:01:50,601 INFO L425 AbstractCegarLoop]: === Iteration 10 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-12-05 21:01:50,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:01:50,602 INFO L85 PathProgramCache]: Analyzing trace with hash -598976296, now seen corresponding path program 1 times [2023-12-05 21:01:50,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:01:50,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831099586] [2023-12-05 21:01:50,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:50,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:01:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:01:50,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:01:50,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831099586] [2023-12-05 21:01:50,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831099586] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:01:50,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388993900] [2023-12-05 21:01:50,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:01:50,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:01:50,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:01:50,721 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:01:50,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-05 21:01:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:01:50,847 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-05 21:01:50,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:01:50,941 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-05 21:01:50,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-05 21:01:51,017 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-05 21:01:51,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-12-05 21:01:51,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-12-05 21:01:51,097 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-05 21:01:51,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-12-05 21:01:51,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-05 21:01:51,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:01:51,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388993900] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:01:51,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:01:51,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2023-12-05 21:01:51,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557622149] [2023-12-05 21:01:51,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:01:51,119 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:01:51,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:01:51,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:01:51,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-05 21:01:51,120 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 142 [2023-12-05 21:01:51,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 1356 transitions, 25377 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:01:51,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:01:51,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 142 [2023-12-05 21:01:51,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-12-05 21:02:11,194 INFO L124 PetriNetUnfolderBase]: 47866/93366 cut-off events. [2023-12-05 21:02:11,195 INFO L125 PetriNetUnfolderBase]: For 607890/630437 co-relation queries the response was YES. [2023-12-05 21:02:11,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 655311 conditions, 93366 events. 47866/93366 cut-off events. For 607890/630437 co-relation queries the response was YES. Maximal size of possible extension queue 7096. Compared 1130020 event pairs, 1836 based on Foata normal form. 1594/79277 useless extension candidates. Maximal degree in co-relation 549973. Up to 52886 conditions per place. [2023-12-05 21:02:13,000 INFO L140 encePairwiseOnDemand]: 110/142 looper letters, 1924 selfloop transitions, 271 changer transitions 0/2257 dead transitions. [2023-12-05 21:02:13,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 2257 transitions, 47071 flow [2023-12-05 21:02:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-05 21:02:13,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-12-05 21:02:13,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 541 transitions. [2023-12-05 21:02:13,002 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6349765258215962 [2023-12-05 21:02:13,003 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 541 transitions. [2023-12-05 21:02:13,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 541 transitions. [2023-12-05 21:02:13,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-12-05 21:02:13,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 541 transitions. [2023-12-05 21:02:13,004 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 90.16666666666667) internal successors, (541), 6 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:13,005 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:13,006 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 142.0) internal successors, (994), 7 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:13,006 INFO L308 CegarLoopForPetriNet]: 139 programPoint places, 2 predicate places. [2023-12-05 21:02:13,006 INFO L500 AbstractCegarLoop]: Abstraction has has 141 places, 2257 transitions, 47071 flow [2023-12-05 21:02:13,007 INFO L501 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:13,007 INFO L225 CegarLoopForPetriNet]: Found error trace [2023-12-05 21:02:13,007 INFO L233 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-05 21:02:13,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-05 21:02:13,215 WARN L482 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-05 21:02:13,216 INFO L425 AbstractCegarLoop]: === Iteration 11 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2023-12-05 21:02:13,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-05 21:02:13,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2093763341, now seen corresponding path program 1 times [2023-12-05 21:02:13,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-05 21:02:13,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326271929] [2023-12-05 21:02:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:13,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-05 21:02:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-05 21:02:13,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-05 21:02:13,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326271929] [2023-12-05 21:02:13,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326271929] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-05 21:02:13,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633335136] [2023-12-05 21:02:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-05 21:02:13,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-05 21:02:13,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-05 21:02:13,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-05 21:02:13,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-05 21:02:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-05 21:02:13,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-05 21:02:13,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-05 21:02:13,574 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-05 21:02:13,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-05 21:02:13,638 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-12-05 21:02:13,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-12-05 21:02:13,676 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-12-05 21:02:13,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-12-05 21:02:13,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-12-05 21:02:13,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-05 21:02:13,739 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-05 21:02:13,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633335136] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-05 21:02:13,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-05 21:02:13,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 12 [2023-12-05 21:02:13,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891789681] [2023-12-05 21:02:13,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-05 21:02:13,741 INFO L576 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-05 21:02:13,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-05 21:02:13,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-05 21:02:13,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-12-05 21:02:13,742 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 142 [2023-12-05 21:02:13,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 2257 transitions, 47071 flow. Second operand has 6 states, 6 states have (on average 63.5) internal successors, (381), 6 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-05 21:02:13,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-12-05 21:02:13,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 142 [2023-12-05 21:02:13,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand